CDB5451A
Name
HDR1
Function Description
Used to switch IIN3+ on the CS5451A between J2
and AGND.
Used to switch VIN3- on the CS5451A between J3
and AGND.
Used to switch VIN3+ on the CS5451A between J1
and AGND.
Used to switch IIN3- on the CS5451A between J4
and AGND.
Used to switch VIN2- on the CS5451A between J6
and AGND.
Used to switch IIN2+ on the CS5451A between J7
and AGND.
Used to switch IIN2- on the CS5451A between J5
and AGND.
Default Setting
IIN3+ Set to BNC J2
Default Jumpers
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
A- O
CPD O
O
O
O
O
O
O
2
O IIN3+
O AGND
O VIN3-
O AGND
O VIN3+
O AGND
O IIN3-
O AGND
O VIN2-
O AGND
O IIN2+
O AGND
O IIN2-
O AGND
O VIN2+
O AGND
O
O
O VIN1+
O AGND
O IIN1-
O AGND
O IIN1+
O AGND
3
HDR2
HDR3
HDR4
HDR5
VIN3- Set to BNC J3
VIN3- Set to BNC J1
IIN3- Set to BNC J4
VIN2- Set to BNC J6
HDR6
IIN2+ Set to BNC J7
HDR7
HDR8
HDR9
HDR10
HDR11
HDR12
IIN2+ Set to BNC J5
Used to switch VIN2+ on the CS5451A between J8
VIN2+ Set to BNC J8
and AGND.
Used to switch between external VA- and on-board
CS5451A charge-pump circuit, CPD
CPD active
Used to switch VIN1+ on the CS5451A between J9
VIN1+ Set to BNC J9
and AGND.
Used to switch IIN1- on the CS5451A between J12
and AGND.
IIN1- Set to BNC J12
Used to switch IIN1+ on the CS5451A between J10
IIN1- Set to BNC J10
and AGND.
S1-1 sets logic level on CS5451A OWRS input pin
S1-2 sets logic level on CS5451A
GAIN
input pin
SW1-2 Open (XIN/1024)
SW1-1 Open (GAIN=x1)
SW1
OPEN
HDR13
Used to switch VIN1- on the CS5451A between J11
VIN1- Set to BNC J11
and AGND.
Used to switch the VREFIN from external VREF
post connector, to the on board LT1004 reference,
or to the on-chip reference VREFOUT. Refer to
Table 3.
VREFIN Set to on-
chip reference
VREFOUT
O
O
O VIN1-
O AGND
HDR14
O
O
O
O LT1004
O VREFOUT
O EXT VREF
Table 2. Default Header Settings
6
DS458DB3
CIRRUS [ CIRRUS LOGIC ]
